Concept albums are not easy to pull off. And hardly any bands these days do that. Honestly, I havent heard many concept albums, but the ones I have, I absolutely love. The amount of thought that needs to be put into it, is alone appreciable. I definitely do think concept albums have an edge on regular albums, atleast in my book.

A lot of opeth albums also are concept albums right? Definetly Damnation and BWP i think.
Oh yes and if youre looking for quality concept albums then check out
Fredrik Thordendal's Special Defects- Sol NIger Within Version 3.33. A huge 55:56 Minute song. Truly sounds like its been played by aliens

Dio - Magica is a concept album. Infact the last track on the album is he talks for about 18 minutes explaining the story of Magica. A very dark concept but hear the album as a whole and it really rocks. Individually they might not be great songs compared to his earlier work.